
Fathers usually have a say in the way their biological children are raised. But Arizona law does not work that way for unmarried fathers. Until paternity is legally established, a father has no enforceable rights to legal decision-making or parenting time (also known as custody) regarding the child.
If the relationship with the child’s mother ends and a father, regardless of how involved he was, is cut off, it can be devastating. An experienced family law attorney can help explain the options available, as well as how paternity and custody intersect under Arizona law.
Married vs. Unmarried Fathers: A Critical Legal Divide
Married and unmarried fathers are treated very differently by Arizona laws. A man is legally presumed to be a child’s father if he was married to the mother at any point during the ten months before the birth, or if the child was born within ten months after the marriage ended by divorce, annulment, or death. For married fathers, this presumption means paternity is already established as a matter of law, and they can move directly into custody and parenting time proceedings as part of a divorce or legal separation case.
Unmarried fathers face a very different legal environment. A man who was not married to the child’s mother at the time of the child’s birth receives no automatic legal rights to the child until paternity is formally established. By default this means the mother alone holds legal and physical custody and she is not required to allow the father to participate in decision making or parenting time.
Only a court order or formal acknowledgement of paternity provides legal standing to an unmarried father.
Why Custody Can’t Come First
Arizona courts cannot issue orders for legal decision making or parenting time to anyone who is not recognized as a legal parent. The legal gateway that provides standing for a father to ask for shared custody is a paternity determination. Without paternity, a father’s rights are limited when it comes to:
- Visitation
- Contesting relocation
- Challenging or participating in decisions about the child’s education, medical care, or religion
A father who has spent time with his child but never established paternity has no enforceable right to continue the relationship, nor a legal defense if the mother wants to assert her sole authority.
Establishing paternity legally requires one of the following:
- A 95 percent probability of paternity through a genetic test
- A Voluntary Acknowledgement of Paternity form signed by both parents and witnessed or notarized, then filed with the proper authorities (state Department of Health Services, Department of Economic Security, and/or state superior court)
- A court order following a paternity action, which also usually involves DNA testing (particularly when the mother does not agree to sign an acknowledgement)
When parents sign and notarize a Voluntary Acknowledgement of Paternity form, it carries the same legal weight as a superior court judgement, but it can be challenged within 60 days of signing if fraud, duress, or a material mistake of fact is alleged.
Fathers who seek recognition of paternity, regardless of their custody or legal decision making status, should note that as the child’s father, they are obligated to provide child support if the mother seeks it through legal channels.
No More Automatic Preference for Mothers
Decades ago, Arizona and other states often favored mothers for child custody in court cases. However, in 2013, state law changed to make legal decision making and parenting time decisions without favoring either parent. The state standard is instead the “best interests of the child” which looks at each parent’s relationship with the child, their ability to cooperate with the other parent, and any history of abuse or substance use issues.

Mitigating Impacts on Arizona Fathers
If a father waits to establish their legal relationship, the other parent can take significant, unilateral steps that make a relationship difficult to establish or maintain. The attorneys at Webster Family Law can help you understand your options and build a plan to protect your relationship with your child. Contact us today for a consultation.
